The objective of this work was to examine the changes in the microstructure and macro physical properties caused by the carbonation of normalised CEM II mortar. Samples were prepared and subjected to accelerated carbonation at 20°C, 65% relative humidity and 20% CO2 concentration. On the microstructure scale, the evolutions of the cumulative pore volume, pore size distribution, and specific sur...

BACKGROUND Ionic dialysance was recently introduced as a means to assess Kt/V (K(ID)t/V). With this method, urea distribution volume (V) has to be estimated. The primary aim of the present study was to assess the agreement between equilibrated Kt/V assessed by urea kinetic modelling (eKt/V) with K(ID)t/V taking into account different estimates of V, and to assess the monthly variation in V. Sec...

The pore size distribution in paper, measured by uid permeation perpendicular to the plane of the sheet, is known to be approximately lognormal with standard deviation proportional to the mean. Also, this corresponds quite well to the polygonal size distribution arising from a random array of lines in a plane, which may be approximated using the negative exponential distribution for inter-cross...

curves need to be interpreted to calculate pore sizes using the Young and Laplace equation Pore size distributions of porous media are of interest to soil scientists, geologists, and engineers with a variety of backgrounds. If known, Pc 2 cos r [1] pore size distributions can be used to determine fluid retention and permeability relationships. In this study, we propose a methodology to predict ...

A simple chemical bath deposition is used to coat a complex porous ceramic scaffold with a conformal Ni layer. The resulting composite is used as a solid oxide fuel cell electrode, and its electrochemical response is measured in humidified hydrogen. X-ray tomography is used to determine the microstructural characteristics of the uncoated and Ni-coated porous structure, which include the surface...

We study how grain shapes impact multiphase flow in porous media the quasi-static regime using an extended pore-network model. The algorithm allows explicit determination of different types pore-scale instabilities and tracks interface motion during fluid-fluid displacement process. It also includes volume capacitance model, such that both evolution capillary pressure signal sizes Haines jumps ...

Slow equilibration of introduced chemicals through tortuous pore space limits uniform substrate distribution in soil biodegradation studies. The necessity of introducing poorly soluble xenobiotics via organic solvents, the volume of which is minimized to limit toxicity, likely also affects xenobiotic distribution. Our objective was to investigate relative effects of carrier solvent choice and v...

Capillary pressure (Pc) curves acquired using the Magnetic Resonance Imaging (MRI) technique, call GIT-CAP, have 70-100 data points. This extra data, when compared with traditional porous plate or centrifuge techniques, allows for the interpretation of more information from the Pc curve. In particular, the pore throat size and relative permeability can be extracted. The pore throat size can be ...